Finding the Fourth Proportional to 1,281,038,851.20, 1,917,731,901.60 and 763,202,740.80
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Solution
The fourth proportional to 1,281,038,851.20, 1,917,731,901.60 and 763,202,740.80 is: 1,142,524,476.95
Step by Step Solution
- Step 1: Write the proportion equation
1,281,038,851.20 : 1,917,731,901.60 = 763,202,740.80 : x - Step 2: Convert to fraction form
1,281,038,851.20/1,917,731,901.60 = 763,202,740.80/x - Step 3: Cross multiply
1,281,038,851.20x = 1,917,731,901.60 × 763,202,740.80 - Step 4: Simplify right side
1,281,038,851.20x = 1,463,618,243,420,715,776 - Step 5: Solve for x
x = 1,463,618,243,420,715,776/1,281,038,851.20 - Step 6: Final answer
x = 1,142,524,476.95
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.